#pragma warning(disable:4996)
#include<ctype.h>
#include<stdio.h>
int main()
{
	char arr[6] = "abCdE";
	int sz = sizeof(arr) / sizeof(arr[0]);
	char arr2[10] = { 0 };
	for (int i = 0; i < sz; i++)
		arr2[i] = toupper(arr[i]);
	printf("%s\n", arr2);

	return 0;
}